I've got a bunch of it in the powder magazine. Some from back in the day, significantly more from purchases since then. I don't shoot it up, but I have a lot of confidence it in.
My gun show pard, Joe, has a unique skill for sniffing out boxes of old ammo. At our down home style shows the good ole boys seem to all have a few boxes of old ammo up for sale. Joe scores it pretty regularly. Some good, some I kind of scratch my head as to why he'd buy it.
Back a few years ago when Obammy was getting himself elected, ammo was in real short supply. Some enterprising guy came in with cases of ammo. It all looked new (as in unsold) but it clearly ranged from the 1960s up to nearly current. Ole Joe came back lugging more than he could carry comfortably, and was goin' out for more. So I followed him and must have picked up a half dozen full boxes and even some of the "ammo wallets" they packaged Super Vel in back then.
In the 1970s we shot some of it up. I never saw what I consider to be excessive pressure signs from firing it. Its admittedly hot stuff, but not gun breaking bad. The M19s problems were pretty well traced to firing 125 gr bullets at high velocity. It was also pretty well limited to some limited sequences of M19s, so the conjecture was bad metal. Notice that the M27s didn't suffer from any kind of forcing cone cracking. Bigger barrel diameter resulted in thicker metal and no problems.
If I were the OP, I'd put it back up on the shelf. 3 years ago I didn't pay as much as Wallyworld was trying to extort out of folks. It was premium ammo back in the day, and hard to locate at any price.
I've even got a box of 44s in 180gr size. I'm thinking of firing it in my 329 to see if it tames the recoil a little. From experience I know the 300 gr loads make it much worse, and the 240s barely tolerable. Maybe the 180s will make it a pussycat.
